And while the short-term savings may bring a smile to some faces, Friday is not the last Parisians will see of the smog.

Indeed, experts have already predicted that it will get worse on Saturday.

All this comes after a four-days of heavy pollution last week, complete with free transport and traffic restrictions. Several people who'd been left hospitalized from breathing the bad air even went as far as trying to sue the city.

The surge in pollution has been driven by cold, dry weather and near windless conditions that have trapped exhaust fumes, smoke from wood fires and other industrial pollutants.